CN202615106U - Light-emitting device and projection system - Google Patents
Light-emitting device and projection system Download PDFInfo
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- CN202615106U CN202615106U CN 201220016347 CN201220016347U CN202615106U CN 202615106 U CN202615106 U CN 202615106U CN 201220016347 CN201220016347 CN 201220016347 CN 201220016347 U CN201220016347 U CN 201220016347U CN 202615106 U CN202615106 U CN 202615106U
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Abstract
Embodiments of The utility model disclose a light-emitting device and a projection system. The light-emitting device comprises a first light source, a second light source, a wavelength conversion apparatus, an optical device and an output terminal, wherein the first light source is used to emit first light; the second light source is used to emit second light; the wavelength conversion apparatus comprises a first section bearing a first wavelength conversion material and a second section which does not bear the wavelength conversion material; the first wavelength conversion material absorbs the first light and generates third light; the third light and the second light are red or orange light; the optical device is used to guide the first and second light as incident light so as to emit to the wavelength conversion apparatus; the wavelength conversion apparatus can move relatively to the first and second light so that the first section and the second section are successively exposed on an optical path of the incident light; the output terminal is used to receive emergent light emitted by the wavelength conversion apparatus; and, in a first period, only the light which is from the first light source is output to the output terminal; in a second period, only the light which is from the second light source is output to the output terminal.
Description
Technical field
The utility model relates to illumination and display technique field, particularly relates to a kind of light-emitting device and optical projection system.
Background technology
Adopt solid state light emitter such as laser diode (LD; Laser Diode) or light emitting diode (LED, the Light Emitting Diode) exciting light that sends and the Wavelength conversion method of material for transformation of wave length such as fluorescent powder or the quantum dot wavelength that can produce high brightness be different from the light of excitation wavelength.In the conventional apparatus, excitation light is to material for transformation of wave length, and this material for transformation of wave length absorbs exciting light and produces the light (stimulated luminescence) that wavelength is higher than excitation wavelength.In order to produce various colors, adopt the different wavelengths transition material.
2009.06.16 the United States Patent (USP) 7547114 of authorizing has been described a kind of light-emitting device based on wavelength Conversion, this device has adopted excitation source and the multistage displacement disc with material for transformation of wave length (like fluorescent powder).Excitation source is to send light emitting diode or the laser diode of light in ultraviolet and/or blue region.Each segmentation of this displacement disc all comprises the different wavelengths transition material or does not contain material for transformation of wave length.Dish is made as and moves so that said different segmentation is exposed in the exciting light at different time.When dish moved, the different wave length transition material of different segmentations on the dish produced the light of different colours in time continuously.This light-emitting device can be used for image and shows the optical projection system with micro-display imager.
2010.10.13 disclosed one Chinese patent application, publication number CN101858496A has described a kind of light-emitting device based on wavelength Conversion, and this device has adopted two light sources of different colors.Two light sources, one is sent blue light, and another sends ultraviolet light, all is placed on before the material for transformation of wave length.Blue light and ultraviolet light combine to be directed to the rotation Wavelength converter through Multiplexing apparatus.This Wavelength converter comprises a plurality of segmentations that carry different wave length transition material (like redness and green light fluorescent powder) and does not carry material for transformation of wave length and the transparent segment of transmissive blue light.Ultraviolet light and blue light all can be used for the excitation wavelength transition material.When transparent segment went in the light path of incident light, ultraviolet light was closed, only have the blue light transmission through this transparent segment to produce blue output light.When the segmentation that carries material for transformation of wave length went in the light path of incident light, blue light and ultraviolet light all opened the excitation wavelength transition material.The employing inductor is responded to the position of rotating Wavelength converter and is sent the signal of control ultraviolet source switch.
Typical multicolor luminous system need produce multiple primary lights, mixes producing other required light like RGB light.Multicolor luminous system also possibly need to produce gold-tinted, produces white light with blue light.In order to produce the polychromatic light that adopts wavelength Conversion; The condition of a key is to utilize material for transformation of wave length; This material for transformation of wave length can convert exciting light to required light, like (but blue light source often directly use rather than wavelength Conversion as blue light) such as red, green, blue and yellows.But the different wavelengths transition material usually has different efficiency.For example, in present available material for transformation of wave length, the light conversion efficiency and the reliability that produce the phosphor material powder (representing with redness or fluorescent orange powder for the purpose of convenient) of ruddiness or orange light are lower than other fluorescent powder, like green and yellow fluorescent powder.
Therefore, a kind of light-emitting device need be provided, to solve owing to the limitation of prior art and the above-mentioned technical matters that shortcoming causes.
The utility model content
The technical matters that the utility model mainly solves provides a kind of light-emitting device and optical projection system, can reduce the low influence of light conversion efficiency of redness or fluorescent orange powder.
The utility model provides a kind of light-emitting device, and wherein, light-emitting device comprises:
First light source is used to launch first light;
Secondary light source is used to launch second light;
Wavelength converter; Comprise at least two segmentations; Carry first segmentation of first material for transformation of wave length and do not carry second segmentation of material for transformation of wave length, first material for transformation of wave length absorbs first light and produces the 3rd light, and the 3rd light and second light are ruddiness or orange light;
Optical devices are used to guide first and second light to be incident upon Wavelength converter as incident light, and Wavelength converter is removable with respect to first and second light sources, so that first and second segmentations are exposed in the light path of incident light successively;
Output terminal is used to receive the emergent light that Wavelength converter sends;
And in very first time section, the light that allows to originate from first light source outputs to output terminal, and stops the light that originates from secondary light source to output to output terminal; In second time period, the light that allows to originate from secondary light source outputs to output terminal, and stops the light that originates from first light source to output to output terminal; Very first time section is the time period of first segmentation of Wavelength converter when being exposed in the light path of incident light, and second time period was the time period of second segmentation of Wavelength converter when being exposed in the light path of incident light.
Preferably, said Wavelength converter also comprises the 3rd segmentation, and the 3rd segment bearing has first light of absorption and produces second material for transformation of wave length of the 4th light or do not carry material for transformation of wave length; And when the 3rd segmentation was exposed in the light path of said incident light, the light that allows to originate from first light source outputed to said output terminal, stoped the light that originates from secondary light source to output to said output terminal.
Preferably, first light that first light source sends is blue light or ultraviolet light, and second light that secondary light source sends is ruddiness.
Preferably, light-emitting device also comprises: inductor, be connected with said Wavelength converter, and be used to respond to the position and send the induced signal that characterizes sensed position of relatively moving of said Wavelength converter; And controller, be connected with said inductor, be used for opening and close first light source or secondary light source or this two control signal for light source according to said induced signal generation.
Preferably, light-emitting device also comprises the first beam split optical filter, and fixed placement is in first segmentation of said Wavelength converter; When the first beam split optical filter placed on the light path of said incident light, the first beam split optical filter stoped second beam projecting to said output terminal.
Preferably; Light-emitting device also comprises the second beam split optical filter; Fixed placement is in second segmentation of said Wavelength converter, and when the said second beam split optical filter placed on the light path of said incident light, the second beam split optical filter stoped first beam projecting to said output terminal.
Preferably; The light-emitting area of secondary light source is provided with the three-wavelength transition material; Light-emitting device also comprises the 3rd light source that is used to launch the 5th light; Said optical devices also are used to guide the 5th light to be incident to said three-wavelength transition material, and the three-wavelength transition material absorbs the 5th light and produces the 6th light, and the 6th light is ruddiness or orange light; Said optical devices also are used to guide the 6th light to said Wavelength converter; And when the subregion at least of second segmentation was exposed in the light path of said incident light, the light that allows to originate from the 3rd light source outputed to said output terminal.
Preferably, light-emitting device also comprises: inductor, be connected with said Wavelength converter, and be used to respond to the position and send the induced signal that characterizes sensed position of relatively moving of said Wavelength converter; And controller, be connected with said inductor, be used for opening and close the 3rd control signal for light source according to said induced signal generation.
The utility model also provides a kind of optical projection system, comprises above-mentioned light-emitting device.
Compared with prior art, the utility model comprises following beneficial effect:
The ruddiness of the light-emitting device outgoing of the utility model or orange light comprise ruddiness or the orange light that direct ruddiness of launching of secondary light source or orange light and material for transformation of wave length are excited to produce; Thereby reduced the use of ruddiness or orange optical wavelength conversion material, reduced the low influence of light conversion efficiency of redness or fluorescent orange powder.
Description of drawings
Fig. 1 is the structural representation of an embodiment of the utility model light-emitting device;
Fig. 2 is the structural representation of the Wavelength converter in the light-emitting device shown in Figure 1;
Fig. 3 is the structural representation of the control system in the light-emitting device shown in Figure 1;
Fig. 4 is the seasonal effect in time series synoptic diagram of Wavelength converter, induced signal and light source in the light-emitting device shown in Figure 1;
Fig. 5 A is the synoptic diagram of the Wavelength converter among another embodiment of the utility model light-emitting device;
Fig. 5 B is the synoptic diagram of the Wavelength converter among another embodiment of the utility model light-emitting device;
Fig. 5 C is the synoptic diagram of the Wavelength converter among another embodiment of the utility model light-emitting device;
Fig. 6 is the structural representation of another embodiment of the utility model light-emitting device;
Fig. 7 is the structural representation of another embodiment of the utility model light-emitting device;
Fig. 8 is the structural representation of another embodiment of the utility model light-emitting device;
Fig. 9 is the structural representation of another embodiment of the utility model light-emitting device.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model embodiment is elaborated.
Fig. 1 is the structural representation of first embodiment of the utility model light-emitting device.As shown in Figure 1, the light-emitting device of present embodiment comprises first light source 1, secondary light source 2, Multiplexing apparatus 3 and Wavelength converter 4.First light source 1 is used to produce an exciting light (first light), and preferred, first light is blue light or ultraviolet light.Secondary light source 2 is used to produce second light, and in a preferred embodiment, second light is ruddiness or orange light.In other embodiments, second light possibly be green glow or other color of light.First light source and secondary light source can be light emitting diode, laser diode or other solid state light emitter.
Among the embodiment shown in Figure 1, Wavelength converter 4 is a transmission-type, i.e. the direct of travel of the emergent light (shown in arrow C) of Wavelength converter generation is identical with incident light A/B.In another embodiment, Wavelength converter 4 is reflective, i.e. the direct of travel of the emergent light of Wavelength converter generation is compared with incident light A/B roughly on the contrary perhaps at angle.In another embodiment, the first and second light A, B lead toward Wavelength converter each other the other way around, and Wavelength converter is the mixed form of transmission, reflection.For example; In such embodiment; First light is from first party guide toward Wavelength converter; Second light is led toward Wavelength converter from second direction (promptly with first party in the opposite direction), and emergent light with first direction advance (in this case, the light that produces of Wavelength converter advance with first direction and Wavelength converter with the second light reflected back first direction).In another such embodiment; First light is from first party guide toward Wavelength converter; Second light is from second party guide toward Wavelength converter; And emergent light with second direction advance (in this case, the light that produces of Wavelength converter advance with second direction and Wavelength converter transmission second light toward second direction).Following specific descriptions concentrate on the transmission-type (Fig. 1); In order to realize various types of devices, can change different position component, and can adopt various or additional optical device such as beam split optical filter as the part of Wavelength converter or suitably be positioned over other position in the light path.The utility model is contained all these different types of devices.Can be based on disclosed description of the utility model and prior art well known in the art at the device that does not need to realize under the too much situation about testing optional type.
The output terminal of light-emitting device is represented with device 7.The emergent light that Wavelength converter 4 sends collected and received to output terminal can with any suitable optical devices.
Other optical devices possibly appear in the light-emitting device but in Fig. 1, not indicate, as place focusing and/or light shaping optical devices before the Wavelength converter 4, place the light after the Wavelength converter to collect optical devices, color filter or the like.
A face of Wavelength converter 4 can comprise a plurality of segmentations.Each segment bearing has the material for transformation of wave length that absorbs exciting light and produce stimulated luminescence, does not perhaps carry material for transformation of wave length (using " transparent " to describe) here.And; Wavelength converter 4 comprises two segmentations at least; Carry first segmentation of first material for transformation of wave length and do not carry second segmentation of material for transformation of wave length, first material for transformation of wave length absorbs first light and produces the 3rd light, and the 3rd light is ruddiness or orange light.Wavelength converter 4 is installed on the supporting construction (indicating among the figure), and moves with it, drops on successively on the light path of incident light A/B in the different segmentations of moving process medium wavelength conversion equipment.
Among the embodiment illustrated in figures 1 and 2, Wavelength converter 4 is a loop configuration, and it places the direction of plane perpendicular to incident light A/B, and rotates (shown in arrow D) around the axle that is parallel to incident light.The circumferential area of Wavelength converter 4 annulars is arranged along angle direction and is divided into a plurality of segmentation 41-44.When Wavelength converter 4 rotated, different segmentations were exposed in the light path of incident light in the different time section.
(not shown) in another replacement scheme, Wavelength converter 4 are one to comprise the dish of a plurality of segmentations that property direction along the line arranges, and move along this linear direction with reciprocating form.(not shown) in another replacement scheme, Wavelength converter 4 are one to be included in the rotating cylinder of a plurality of segmentations that cylinder arranges along angle direction.The mechanism that the realization Wavelength converter moves and the prior art of electricity structure and association area are similar.
In the preferred embodiment shown in Figure 2, Wavelength converter 4 comprises 4 adjacent first segmentations 41, second segmentation 42, the 3rd segmentation 43 and the 4th segmentation 44.First segmentation 41 and the 4th segmentation 44 carry orange respectively and the green wavelength transition material, and this material for transformation of wave length absorbs first light of first light source generation and sends orange light and green glow respectively.When first light was blue light, the 3rd segmentation 43 did not carry material for transformation of wave length, and transmission first light; When first light was ultraviolet light, the 3rd segmentation 43 carried the blue wavelength transition material and is excited the generation blue light by first light.Second segmentation 42 does not carry the ruddiness of material for transformation of wave length and 2 generations of transmission secondary light source.In another replacement scheme, the material for transformation of wave length of first segmentation 41 and secondary light source 2 all produce orange light or ruddiness.In another replacement scheme, the material for transformation of wave length of first segmentation 41 and secondary light source 2 produce ruddiness and orange light respectively.Optional, the 4th segmentation 44 also can change carries the yellow wavelengths transition material, and this material for transformation of wave length absorbs first light of first light source generation and sends gold-tinted respectively.
Alternatively, adopt an optical filter to stop remaining blue light or ultraviolet light in the first, the 4th segmentation (green and red segment) 41,44 backs.Alternatively, available enough thick material for transformation of wave length layer reduces remaining blue light or ultraviolet light.In addition, use the optical filter of block ultraviolet in also can the light path behind colour wheel.
Among first embodiment, it opens or closes first and second light sources 1,2 according to an AD HOC Be Controlled, and the moving synchronously of its open/close time period and Wavelength converter 4, to produce the emergent light C with different colours in different time sections.Concrete, first light source 1 (blueness or uv excitation light) controlled opening when segmentation 41,43 and 44 goes to the light path of incident light, and when segmentation 42 goes to the light path of incident light controlled closing.Secondary light source 2 (directly red emergent light) controlled opening when segmentation 42 goes to the light path of incident light, and when segmentation 41,43 and 44 goes to the light path of incident light controlled closing.As a result, the emergent light C that collect Wavelength converter 4 backs is respectively orange light, blue light, green glow when segmentation 41,43 and 44 goes to the light path of incident light, be ruddiness when segmentation 41 goes to the light path of incident light.Under this pattern, the ruddiness that secondary light source 3 produces directly penetrates as emergent light, rather than as the exciting light of material for transformation of wave length.
For transmission-type Wavelength converter 4, transparent segment 42 and 43 is respectively applied for transmit red light and blue light.For reflective Wavelength converter 4, transparent segment 42 and 43 is respectively applied for reflect red and blue light.
The need explanation is among Fig. 2, and the color of segmentation 41-44 indicates corresponding to emergent light color, rather than the material for transformation of wave length color, and this is because segmentation 41 and 42 possibly not comprise material for transformation of wave length.
Available control system is come the on off state of synchronous first and second light sources 1,2 and moving of Wavelength converter 4.As shown in Figure 3, control system comprises inductor 5, is connected with Wavelength converter 4, is used to respond to the position and send the induced signal that characterizes sensed position of relatively moving of Wavelength converter 4.Controller 6 is connected with inductor 5, can produce the control signal of opening and closing first and second light sources 1,2 according to the induced signal that inductor 5 sends.Controller 6 can be a unit of two light sources of control, perhaps can be two unit controlling two light sources respectively.Controller 6 produces control signals, so that when segmentation 41,43 and 44 is exposed in the light path of incident light A/B, opens first light source and close secondary light source, and when segmentation 42 is exposed in the light path of incident light A/B, opens secondary light source and closes first light source.
Any suitable induction system all possibly be used to realize inductor 5, and inductor can be under any suitable manner the moving of inductive coupling Wavelength converter 4.For example, inductor 5 possibly be optical decoder device, resolver, Hall element etc., is used to respond to the position of Wavelength converter 4.Optional, inductor can be optical sensor, is used to respond to the color of the Wavelength converter 4 emergent light C relevant with the position of Wavelength converter 4 that send.
First and second light sources 1 and 2 can comprise the power supply of switch light source, perhaps can comprise with in the mechanism, on the optics or alternate manner stop the optical gate of the light that each light source sends.As making Optic gate, it can be between each light source 1,2 and Multiplexing apparatus 3.Optical gate also can be an ingredient of light source.Therefore, term " opening and closing light source " but extensive interpretation arrives the enforcement of Wavelength converter 4 for the light that can cover any permission or stop light source to send.In reality is implemented, make Optic gate can cause the waste of luminous energy, and the power supply of switch light source is owing to have energy-saving advantages, and implements not difficultly, become comparatively preferred control mode.
In a specific embodiment, inductor 5 produces a pulse signal when Wavelength converter 4 goes to an ad-hoc location, and the boundary between first segmentation 41 (orange) this moment and second segmentation 42 (redness) is through the light path of incident light A/B.When controller 6 received the pulse that inductor 5 sends, controller 6 control secondary light sources open and first light source is closed; Through (when the boundary between red segment and the blue segment passes through the light path of incident light A/B) behind the predetermined amount of time, secondary light source is closed and first light source is opened again.When receiving next pulse of inductor 5, the controller opens secondary light source is also closed first light source afterwards, and this sequence of events repeats.In an example, the rotation period of Wavelength converter 4 is that 10ms and predetermined amount of time are 2.5ms.
Fig. 4 is the sequential synoptic diagram of Wavelength converter 4, inductor 5 and the light source 1,2 of present embodiment.(a)-(d) row has identical time shaft (arbitrary unit).(a) emergent light color of the mobile and Wavelength converter of line display Wavelength converter 4.For example, the square that indicates " R " is represented to work as the time period that red segmentation 42 is positioned at optical path of incident light and ruddiness outgoing; The square that indicates " B " representes to be positioned at when blue segment 43 time period of optical path of incident light and blue light outgoing; Or the like.(b) pulse signal of line display inductor 5 generations.(c) row and (d) the capable on off state of representing secondary light source (red-light source) and first light source (blue light source) respectively; The square that indicates " R " is represented the time period that secondary light source (red-light source) is opened; The square that indicates " B " is represented the time period that first light source (blue light or ultraviolet source) is opened.
Sequential shown in Figure 4 is merely an example; Also can adopt other sequential.For example, pulse signal can produce at the boundary of red segment 42 and blue segment 43, and perhaps other position in Wavelength converter 4 rotates produces.
Fig. 5 A-5C be the utility model second, third, the synoptic diagram of the Wavelength converter among the 4th embodiment.Except that the structure of Wavelength converter 4, second, third, optical arrangement and first embodiment (Fig. 1) among the 4th embodiment be roughly the same.At second, third, among the 4th embodiment, suitable beam split optical filter is fixed in some segmentation of Wavelength converter, thereby can remove the needs that first, second light source 1 and 2 is carried out opening and closing from.
Fig. 5 A is the synoptic diagram of the Wavelength converter among another embodiment of the utility model light-emitting device.Wavelength converter 4A comprises four segmentation 41A-44A that press close to.Carry material for transformation of wave length from segmentation and whether see that segmentation 41A-44A is identical with the segmentation 41-44 of first embodiment.But, be placed with the beam split optical filter 1 of first light (blue light or ultraviolet light) that second light (ruddiness) that a reflection secondary light source produces and transmission first light source produce on orange, blueness and green segment 41A, 43A and the 44A.Do not place optical filter on the red segment 41A.Adopt this Wavelength converter 4A, when orange, blueness and green segment 41A, 43A and 44A went in the light path of incident light A/B, second (redness) light source must not closed.In other words, sustainable the lighting of second (redness) light source.First (blueness or ultraviolet) light source still must be closed when red segmentation 42A goes in the light path of incident light A/B.
Fig. 5 B is the synoptic diagram of the Wavelength converter among another embodiment of the utility model light-emitting device.Wavelength converter 4B comprises four segmentation 41B-44B that press close to.Carry material for transformation of wave length from segmentation and whether see that segmentation 41B-44B is identical with the segmentation 41-44 of first embodiment.But, be placed with first light (blue light or ultraviolet light) of a reflection first light source generation and the beam split optical filter 2 of second light (ruddiness) that the transmission secondary light source produces on the red segment 41B.Do not place optical filter on orange, blueness and green segment 41B, 43B and the 44B.Adopt this Wavelength converter 4B, when red segmentation 42B went in the light path of incident light A/B, first (blueness or ultraviolet) light source must not closed.In other words, light source is sustainable lights for first (blueness or ultraviolet).Second (redness) light source still must be closed when orange, blueness and green segment 41B, 43B and 44B go in the light path of incident light A/B.
Fig. 5 C is the synoptic diagram of the Wavelength converter 4C of the 4th embodiment.Wavelength converter 4C comprises four segmentation 41C-44C that press close to.Carry material for transformation of wave length from segmentation and whether see that segmentation 41C-44C is identical with the segmentation 41-44 of first embodiment.But; Be placed with the beam split optical filter 1 of first light (blue light or ultraviolet light) that second light (ruddiness) that a reflection secondary light source produces and transmission first light source produce on orange, blueness and green segment 41C, 43C and the 44C, and be placed with the beam split optical filter 2 of reflection first light (blue light or ultraviolet light) and transmission second light (ruddiness) on the red segment 41C.Adopt this Wavelength converter 4C, all sustainable the lighting of first (blueness or ultraviolet) light source and second (redness) light source.For the 4th embodiment, the control system that comprises inductor 5 and controller 6 (Fig. 3) can be omitted.
In each embodiment shown in Fig. 5 A-5C, the beam split optical filter is positioned at the whole zone of corresponding segments.In each embodiment of Fig. 5 A-5C, the beam split optical filter can preferably be positioned at the one side of material for transformation of wave length towards incident light A/B.Optical filter also can be positioned at the one side of the A/B of incident light dorsad of material for transformation of wave length.But in the latter's structure, the orange light of material for transformation of wave length outgoing and second light (ruddiness) have spectra overlapping, and the beam split optical filter is reflecting part orange light in transmissive part orange light, thereby cause light loss.
In addition, be reflective like Wavelength converter 4A/4B/4C, the beam split optical filter is positioned at the one side of the A/B of incident light dorsad of material for transformation of wave length.The beam split light-filtering characteristic of optical filter is opposite.In other words, beam split optical filter reflection second (redness) light and transmission first (blueness or the ultraviolet) light that are used for red segment 42B/42C.The beam split optical filter that is used for orange, blueness and green segment 41A/41C, 43A/43C and 44A/44C reflects first light (blue light or ultraviolet light) and transmission second light (ruddiness).
See from the description of above-mentioned each embodiment; Necessary condition on light-emitting device is functional is following: " redness " time period (promptly being arranged in the light path of incident light A/B as red segmentation 42/42A/42B/42C); The ruddiness that secondary light source sends outgoing after Wavelength converter 4, and the blue light that first light source sends can not outgoing." non-redness " time period (promptly being arranged in the light path of incident light) when the segmentation of non-red segment, the blue light outgoing that the stimulated luminescence or first light source send, and the ruddiness that secondary light source sends can not outgoing.
More broadly; The characteristic of the light-emitting device of the utility model the foregoing description does; In very first time section (the non-red time period; Like the orange time period), after the Wavelength converter 4 only outgoing originate from the light (receiving the stimulated luminescence of blue light or ultraviolet excitation generation like blue light itself or material for transformation of wave length) of first light; In second time period (red time period), only outgoing originates from the light (like ruddiness self) of second light.Two time periods did not have overlapping in time.The light of " the originating from A " of using during the utility model is discussed comprises the stimulated luminescence that light that light that A itself sends and A itself send produces through excitated fluorescent powder.Be not limited to form the light that A itself sends and the mixed light of this stimulated luminescence " comprising " here.
The function that above-mentioned different structure is realized is: the light that allows to originate from first light source in very first time section outputs to the light that output terminal and prevention originate from secondary light source and outputs to output terminal; And output to the light that output terminal and prevention originate from first light source at the light that second time period allowed to originate from secondary light source and output to output terminal, second time period and very first time section are not overlapping.In above-mentioned first embodiment, realize that the structure of above-mentioned functions comprises control structure, the switch and the Wavelength converter that are used to control two light sources are synchronous.In above-mentioned Fig. 5 A and Fig. 5 A illustrated embodiment; The structure that realizes above-mentioned functions comprises control structure; The switch and the Wavelength converter that are used to control one of two light sources are synchronous, cooperate the suitable beam split optical filter that adopts corresponding to the selected segmentation of Wavelength converter simultaneously.In above-mentioned Fig. 5 C illustrated embodiment, realize that the structure of above-mentioned functions comprises the suitable beam split optical filter corresponding to the selected segmentation of Wavelength converter.Other structure also possibly exist.
In some cases, the necessary condition that above-mentioned two time periods can not be overlapping can be relaxed.For example; When first light is that the blue light and second light are ruddiness, and when segmentation 42 and segmentation 43 are transparent (like Fig. 2), the switch of may command blue light and ruddiness then; So that when segmentation 42 and/or 43 was arranged in time period of light path of incident light, blue light and ruddiness were opened simultaneously.This possibly make purple light outgoing in a time period.
See also Fig. 6, Fig. 6 is the structural representation of another embodiment of the utility model light-emitting device.As shown in Figure 6, present embodiment and difference part embodiment illustrated in fig. 1 are: the Multiplexing apparatus 3 in the present embodiment is the catoptron of a band light hole 31, and first light source is a LASER Light Source.First light that first light source 1 produces is incident on the lens 8 through the light hole 31 of catoptron; The part ruddiness that secondary light source 2 produces reflexes on the lens 8 through the outside reflecting surface of the light hole of catoptron, and lens 8 focus to this first light and ruddiness on the Wavelength converter 4.Can account for the scale of catoptron area through the control light hole, make when guaranteeing that first light that first light source 1 produces sees through light hole, be reflected the as much as possible reflecting surface reflection of mirror of the ruddiness that secondary light source 2 produces.
Need to prove that here just in order to make the hot spot that is incident in Wavelength converter 4 less, therefore under some application scenarioss less demanding to this spot size, lens 8 are omissible to lens 8.In addition, the blue segment in the present embodiment preferably is provided with scattering sheet, with to the blue laser scattering of first light source 1 emission with eliminating coherence.
Compare with embodiment illustrated in fig. 1, present embodiment adopts the catoptron of band light hole to substitute the beam split optical filter first light and second light is closed light, has lower-cost advantage.
See also Fig. 7, Fig. 7 is the structural representation of another embodiment of the utility model light-emitting device.As shown in Figure 7; Present embodiment and difference part embodiment illustrated in fig. 6 are: in the present embodiment; The light-emitting area 21 of secondary light source 2 is provided with the three-wavelength transition material, and light-emitting device comprises that also the 3rd light source 9, the five light that the 5th light takes place can be blue light or ultraviolet light; The light hole of catoptron 3 also is used to guide the 5th light to be incident to the three-wavelength transition material on the light-emitting area 21 of secondary light source, and the three-wavelength transition material absorbs the 5th light and produces the 6th light, and the 6th light is ruddiness or orange light.And Multiplexing apparatus 3 also is used to guide the 6th light to the Wavelength converter 4 of light-emitting area 21 outgoing; And when the subregion at least of second segmentation of Wavelength converter 4 was exposed in the light path of incident light, the light (i.e. the 6th light) that allows to originate from the 3rd light source 9 outputed to output terminal 7.
For instance; If the 6th light that the three-wavelength transition material produces is orange light; And when half zone of second segmentation (red segment) of Wavelength converter 4 is exposed in the light path of incident light, allow the 6th light (orange light) to output to output terminal 7, promptly orange light outputs to output terminal 7 in the half the time section of second time period; And ruddiness is in the whole time period outgoing of second time period, and therefore the mixed light at the second time period ruddiness and orange light outputs to output terminal 7.Because the monochromatic light ray spectral width that secondary light source (like red LED) produces is less, therefore bright-colored beautiful, but its problem is that efficient is relatively low; And the monochromatic efficient that three-wavelength transition material (like the fluorescent orange powder) produces is higher; But because spectral width seems to be difficult to satisfactory than its glow color of ambassador; Therefore the mixed light formed of the ruddiness that directly produced by secondary light source in the outgoing of second time period of present embodiment and the orange light of three-wavelength transition material generation, this mixed light has the advantage that efficient is higher and color is more bright-coloured.
Be same as embodiment illustrated in fig. 1; The also available control system of present embodiment is come the on off state of synchronous the 3rd light source 9 and moving of Wavelength converter 4; In the present embodiment promptly; The controller that is connected with inductor also is used for producing the control signal open and cut out the 3rd light source 9 according to induced signal, opens the 3rd light source 9 when being exposed in the light path of incident light with the subregion at least in second segmentation of Wavelength converter 4.Certainly, present embodiment also can adopt the beam split optical filter to control the 6th light and export output terminal 7 to.For example, when the 6th light is the orange light time, can the beam split optical filter that transmit red light reflects orange light be set in the zone that can not export orange light of second segmentation of Wavelength converter 4, and light transmission piece all be set in other zone of second segmentation.
See also Fig. 8, Fig. 8 is the structural representation of another embodiment of the utility model light-emitting device.As shown in Figure 8; Present embodiment and difference part embodiment illustrated in fig. 1 are: the Wavelength converter 4 in the present embodiment is the mixed form of transmission, reflection; Promptly first light source 1 and secondary light source 2 are located at the both sides of Wavelength converter 4 respectively, and Wavelength converter 4 no blue segment.First light that first light source 1 produces converges to Wavelength converter 4 after beam split optical filter 3 is transmitted through lens 8; The light (comprising stimulated luminescence) that Wavelength converter 4 reflections originate from first light source 1 is to beam split optical filter 3, and this stimulated luminescence is reflexed to output terminal 7 by beam split optical filter 3.Second light outgoing to beam split optical filter 3 after the red segment of Wavelength converter 4 is transmitted through lens 8 that secondary light source 2 produces, beam split optical filter 3 reflexes to output terminal 7 with second light.
Owing to need have certain distance between secondary light source 2 and the Wavelength converter 4; Therefore for lens 8; Must there be one to want out of focus in secondary light source 2 and the Wavelength converter 4, in the present embodiment, selects secondary light source 2 to be positioned on the focus of lens 8; In other embodiments, also can select Wavelength converter 4 to be positioned on the focus of lens 8.
Be understood that easily; Beam split optical filter 3 also can be the catoptron of band light hole; First light that first light source 1 produces is transmitted through lens 8 through light hole, and the part light that Wavelength converter 4 sends (comprising the light that originates from first light source 1, secondary light source 2) is through mirror reflects to output terminal 7.At this moment; Wavelength converter 4 can be provided with blue segment; This segmentation is provided with scattering sheet (being applicable to that first light is blue light) or material for transformation of wave length (being applicable to that first light is ultraviolet or black light), and the blue light that this blue segment produces is lambertian distribution, has big optical extend; Therefore the be reflected reflecting surface of mirror of major part reflexes to output terminal, and fraction leaks from light hole.
See also Fig. 9, Fig. 9 is the structural representation of another embodiment of the utility model light-emitting device.As shown in Figure 9, present embodiment and difference part embodiment illustrated in fig. 9 are: present embodiment also comprises lens 81, is used to collect also second light of collimation secondary light source 2 emissions; Lens 82 are used for the light from lens 81 is focused to Wavelength converter 4, thereby when making first light of second light that secondary light source produces and the generation of first light source be incident upon Wavelength converter 4, all are positioned on the focus of lens 83.
In addition; For the outgoing blue light to output terminal, present embodiment also comprise one the emission blue light the 3rd light source 9, this blue light can be transmitted through output terminal 7 through beam split optical filter 3; And; On Wavelength converter 4, establish a blue segment, when blue segment was exposed in the light path of incident light, the blue light that allows the 3rd light source 8 to send outputed to output terminal 7.
The difference of embodiment of the utility model and the institute of the one Chinese patent application CN101858496A in background technology descriptive system is: the segmentation that carries material for transformation of wave length in the latter's the scheme is simultaneously by two light source activations; Originate from the stimulated luminescence outgoing simultaneously of this two light source (ultraviolet and blue light) this moment, therefore require this two light source all can send exciting light (like blue light or UV light); And in the scheme of the utility model; The light that originates from first light source is not designed to outgoing simultaneously with the light that originates from secondary light source; Therefore the segmentation (second segmentation) that carries first material for transformation of wave length does not require that secondary light source can send exciting light only by the optical excitation of first light source.And; In the utility model; Secondary light source is the red or orange light source longer than the wavelength of excitation source, according to stoke drift principle, with respect to the latter's scheme; The utility model is luminous with the light replacement redness or the fluorescent orange powder of the longer light source outgoing of this wavelength, has reduced redness or the low influence of fluorescent orange powder light conversion efficiency.In fact; Use blue light to replace light-emitting phosphor in the latter's the scheme; Be from blue light be visible light; And can be with UV light as the excitation light source excites green emitting phosphor, so to use blue light in the latter's the scheme be not from the reason that solves the light conversion efficiency problem, otherwise should adopt the light source longer than blue light wavelength.
2009.12.12 disclosed one Chinese patent application, publication number CN 101592308A has described a kind of light-emitting device based on wavelength Conversion, and this device has adopted two light sources.First light source produces exciting light (like blue light or ultraviolet light), is used for the excitation wavelength transition material.Exciting light guides to rotating disk, and this rotating disk comprises a plurality of segmentations with material for transformation of wave length.The light that light and the material for transformation of wave length that secondary light source (blue light or ruddiness) sends is excited to send combines through the beam split optical filter, and this beam split optical filter is positioned at the downstream of the luminous light path of material for transformation of wave length.The switch of may command secondary light source for example has only when rotating disk goes to the boundary that closes on two segmentations secondary light source just can open.This system can solve spoke light (spoke light) problem that rotating disk brings.Spoke light relates to the invalid mixing of the different colours light that occurs in rotating disk two section boundaries places, is that dispersion and/or other factors by stimulated luminescence causes.
The difference of the embodiment of the utility model and 101592308 descriptive systems of above-mentioned one Chinese patent application CN is the position of Multiplexing apparatus (beam split optical filter) in light path.In the embodiment of the utility model, Multiplexing apparatus 3 is positioned at the upper reaches of material for transformation of wave length light path.And in CN101592308, Multiplexing apparatus is positioned at the downstream of material for transformation of wave length light path.
A factor of CN 101592308 structures is: in this device, and the spoke light problem that the function of secondary light source is produced by the rotation colour wheel for correction, so secondary light source is not suitable for being placed on the upper reaches of rotating the colour wheel light path.In this device, the light of secondary light source combines through the beam split optical filter with the stimulated luminescence of material for transformation of wave length.It is that two kinds of light spectrum do not have overlapping that the beam split optical filter combines the basis of two kinds of light.Therefore in the system of CN 101592308, the wave spectrum of secondary light source must most of separate so that they combine through the beam split optical filter with the wave spectrum of stimulated luminescence.Like both spectra overlappings, both one of lap can lose.This problem defines the selection of material for transformation of wave length and the color of secondary light source.For example, the spectrum of orange or red fluorescent powder and ruddiness or orange light LED spectrum major part are overlapping.Therefore, be ruddiness or orange light LED like secondary light source, then redness or fluorescent orange powder are not suitable for as the material for transformation of wave length that rotates colour wheel.And the utility model can be avoided the problem of patent CN 101592308.Because the monochromatic light ray spectral width that secondary light source (like red or orange LED) produces is less, therefore bright-colored beautiful, but its problem is that efficient is relatively low; And under laser excitation; The monochromatic efficient that redness or orange wavelength transition material produce is higher; But because spectral width seems to be difficult to satisfactory than its glow color of ambassador; Therefore by the ruddiness of the direct ruddiness that produces of secondary light source or orange light and material for transformation of wave length generation or the mixed light that orange light is formed, this mixed light has the advantage that efficient is higher and color is more bright-coloured to the utility model in the outgoing of second time period.
The utility model also provides a kind of optical projection system, comprises the light-emitting device among above-mentioned each embodiment.
The above is merely the embodiment of the utility model; Be not thus the restriction the utility model claim; Every equivalent structure or equivalent flow process conversion that utilizes the utility model instructions and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the utility model.
Claims (9)
1. a light-emitting device is characterized in that, said light-emitting device comprises:
First light source is used to launch first light;
Secondary light source is used to launch second light;
Wavelength converter; Comprise at least two segmentations; Carry first segmentation of first material for transformation of wave length and do not carry second segmentation of material for transformation of wave length, first material for transformation of wave length absorbs first light and produces the 3rd light, and the 3rd light and second light are ruddiness or orange light;
Optical devices; Be used to guide said first and second light to be incident upon said Wavelength converter as incident light; Said Wavelength converter is removable with respect to said first and second light sources, so that said first and second segmentations are exposed in the light path of said incident light successively;
Output terminal is used to receive the emergent light that said Wavelength converter sends;
And in very first time section, the light that allows to originate from first light source outputs to said output terminal, and stops the light that originates from secondary light source to output to said output terminal; In second time period, the light that allows to originate from secondary light source outputs to said output terminal, and stops the light that originates from first light source to output to said output terminal; Very first time section is the time period of first segmentation of said Wavelength converter when being exposed in the light path of said incident light, and second time period was the time period of second segmentation of said Wavelength converter when being exposed in the light path of said incident light.
2. light-emitting device according to claim 1 is characterized in that said Wavelength converter also comprises the 3rd segmentation, and the 3rd segment bearing has first light of absorption and produces second material for transformation of wave length of the 4th light or do not carry material for transformation of wave length; And when the 3rd segmentation was exposed in the light path of said incident light, the light that allows to originate from first light source outputed to said output terminal, stoped the light that originates from secondary light source to output to said output terminal.
3. light-emitting device according to claim 2 is characterized in that, first light that first light source sends is blue light or ultraviolet light, and second light that secondary light source sends is ruddiness.
4. light-emitting device according to claim 1 is characterized in that, also comprises:
Inductor is connected with said Wavelength converter, is used to respond to the position and send the induced signal that characterizes sensed position of relatively moving of said Wavelength converter; And
Controller is connected with said inductor, is used for opening and close first light source or secondary light source or this two control signal for light source according to said induced signal generation.
5. light-emitting device according to claim 1 is characterized in that, also comprises the first beam split optical filter, and fixed placement is in first segmentation of said Wavelength converter; When the first beam split optical filter placed on the light path of said incident light, the first beam split optical filter stoped second beam projecting to said output terminal.
6. light-emitting device according to claim 1; It is characterized in that; Also comprise the second beam split optical filter; Fixed placement is in second segmentation of said Wavelength converter, and when the said second beam split optical filter placed on the light path of said incident light, the second beam split optical filter stoped first beam projecting to said output terminal.
7. light-emitting device according to claim 1; It is characterized in that; The light-emitting area of secondary light source is provided with the three-wavelength transition material, and light-emitting device also comprises the 3rd light source that is used to launch the 5th light, and said optical devices also are used to guide the 5th light to be incident to said three-wavelength transition material; The three-wavelength transition material absorbs the 5th light and produces the 6th light, and the 6th light is ruddiness or orange light; Said optical devices also are used to guide the 6th light to said Wavelength converter; And when the subregion at least of second segmentation was exposed in the light path of said incident light, the light that allows to originate from the 3rd light source outputed to said output terminal.
8. light-emitting device according to claim 7 is characterized in that, also comprises:
Inductor is connected with said Wavelength converter, is used to respond to the position and send the induced signal that characterizes sensed position of relatively moving of said Wavelength converter; And
Controller is connected with said inductor, is used for opening and close the 3rd control signal for light source according to said induced signal generation.
9. an optical projection system is characterized in that, comprises like each described light-emitting device in the claim 1 to 8.
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| CN 201220016347 CN202615106U (en) | 2012-01-14 | 2012-01-14 | Light-emitting device and projection system |
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| CN 201220016347 CN202615106U (en) | 2012-01-14 | 2012-01-14 | Light-emitting device and projection system |
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Address after: 518000 20-22, 20-22 headquarters building, 63 high tech Zone, Xuefu Road, Nanshan District, Guangdong Province, Guangdong. Patentee after: APPOTRONICS Corp.,Ltd. Address before: 518000 20-22, 20-22 headquarters building, 63 high tech Zone, Xuefu Road, Nanshan District, Guangdong Province, Guangdong. Patentee before: SHENZHEN GUANGFENG TECHNOLOGY Co.,Ltd. |
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| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 518000 20-22, 20-22 headquarters building, 63 high tech Zone, Xuefu Road, Nanshan District, Guangdong Province, Guangdong. Patentee after: SHENZHEN GUANGFENG TECHNOLOGY Co.,Ltd. Address before: 518057 Guangfeng Photoelectric Technology Co., Ltd. on the third floor of Fangda Building, Nanshan Science Park, Shenzhen City, Guangdong Province Patentee before: APPOTRONICS Corp.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121219 |